NJM79L18UA-TE1

Product Overview

Category

The NJM79L18UA-TE1 belongs to the category of voltage regulators.

Use

It is primarily used to regulate and stabilize voltage levels in electronic circuits.

Characteristics

• Low dropout voltage
• High ripple rejection ratio
• Short-circuit protection
• Thermal shutdown protection

Package

The NJM79L18UA-TE1 comes in a small outline package (SOP) with three pins.

Essence

The essence of this product lies in its ability to provide a stable output voltage despite fluctuations in input voltage.

Packaging/Quantity

The NJM79L18UA-TE1 is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: -35V to -20V
• Output Voltage: -18V
• Output Current: 100mA
• Dropout Voltage: 1.2V (typical)
• Ripple Rejection Ratio: 60dB (typical)
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The NJM79L18UA-TE1 has three pins:

1. INPUT: This pin is connected to the input voltage source.
2. GROUND: This pin is connected to the ground reference.
3. OUTPUT: This pin provides the regulated output voltage.

Functional Features

• Low Dropout Voltage: The NJM79L18UA-TE1 exhibits a low dropout voltage, ensuring efficient regulation even when the input voltage is close to the desired output voltage.
• High Ripple Rejection Ratio: It effectively filters out unwanted AC components from the input voltage, resulting in a cleaner and more stable output.
• Short-Circuit Protection: The device is equipped with short-circuit protection, preventing damage to the regulator and the connected circuit in case of a short circuit.
• Thermal Shutdown Protection: In the event of excessive heat, the NJM79L18UA-TE1 automatically shuts down to prevent overheating and potential damage.

Advantages and Disadvantages

Advantages

• Provides stable output voltage despite input voltage fluctuations
• Low dropout voltage ensures efficient regulation
• High ripple rejection ratio for cleaner output
• Short-circuit protection prevents damage
• Thermal shutdown protection safeguards against overheating

Disadvantages

• Limited output current capacity (100mA)
• Restricted input voltage range (-35V to -20V)

Working Principles

The NJM79L18UA-TE1 operates based on the principle of linear voltage regulation. It utilizes a series pass transistor to regulate the output voltage. The device compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage.

Detailed Application Field Plans

The NJM79L18UA-TE1 finds applications in various electronic circuits where a stable negative voltage of -18V is required. Some common application fields include:

1. Audio Amplifiers: It can be used to provide a regulated negative supply voltage for audio amplifiers, ensuring consistent performance.
2. Instrumentation Systems: The NJM79L18UA-TE1 can be employed in instrumentation systems that require a stable negative voltage source.
3. Industrial Control Systems: It finds use in industrial control systems where a reliable negative voltage is necessary for proper operation.

Detailed and Complete Alternative Models

1. LM79L18: This voltage regulator offers similar specifications and pin configuration as the NJM79L18UA-TE1.
2. MC79L18: Another alternative model with comparable characteristics and functionality.
3. UA79L18: This voltage regulator is a suitable substitute for the NJM79L18UA-TE1, providing the same output voltage and features.

(Note: The above alternative models are provided as examples and may vary based on availability and specific requirements.)

Word count: 529 words